Marion Delorme (3 October 1613 – 2 July 1650) was a French courtesan known for her relationships with the important men of her time.

Initiated into the philosophy of physical pleasures by the epicurean and atheist Jacques Vallée, Sieur Des Barreaux, she soon left him for Henri Coiffier de Ruzé, Marquis of Cinq-Mars, at that time at the height of his popularity, and succeeded, it is said, in marrying him in secret.

After the execution of Cinq-Mars, she is said to have numbered among her lovers and benefactors Charles de Saint-Évremond (1610–1703) the wit and litterateur, George Villiers, 2nd Duke of Buckingham, Louis, Grand Condé, and even Cardinal Richelieu.

Under the Fronde her salon became a meeting place for the disaffected, and Mazarin is said to have sent officials to arrest her when she suddenly died.

But she was believed to have lived until 1706 or even 1741, after having had the most fantastic adventures, including marriage with an English lord, and an old age spent in poverty in Paris.